I have iPhone interface almost ready for any HN-like site that's written in Arc. Supports voting, comments etc. I'll release it at some point as beta on newmogul.com and then as source. If you run a site based on Arc codebase, let me know if you want it early.
Am I the only one who thinks HN works really well on the iPhone? I've never had any problems using it, but as there's like 2-3 of these iPhone versions I guess I'm in the minority.
The main thing I dislike about this is that the domain isn't shown. But neither this nor iCombinator does as good a job as the main HN site at displaying a lot of information in a small amount of space. There is no need for iCombinator to have three lines per entry, and I think that your one needs to display more information.
I would really love to have an iPhone app that allows me to read and comment on HN (as opposed to just browsing with Safari). Something similar to the SFNetNews app for reading Slashdot, etc. I was thinking of writing one for HN since I haven't been able to find one and I figure it will be a good first-iPhone-app for me. :)
Still wish there was a way to make safari open a link without loading any images. When I have poor reception or know I will only have, say, another 5 seconds of reception (subway leaving the station) it helps to know a page can load nearly instantly.